Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5041178 | Method of manufacturing a fibrous board | William H. Kielmeyer, Richard J. Ray | 1991-08-20 |
| 4886561 | Method of making an insulated window | Richard J. Ray | 1989-12-12 |
| 4835045 | Fiber glass board and method of manufacture | William H. Kielmeyer, Richard J. Ray | 1989-05-30 |
| 4726985 | Reflective fibrous insulation | Ralph Michael Fay | 1988-02-23 |